Printing-press.



- H. L. KOEHLER PRINTING PRESS. APPLICATION FILED JULY 2, 1912.

L1 03, 1 47. Patented July 14,1914.

4 BHE ET8-8HBET 1.

H. L. KOEHLER.

PRINTING PRESS.

APPLICATION FILED JULY 2, 1912.

Patented July 14, 1914.

4 SHEET$SHEET 2.

INVENTOR SHL W1 T/VESSES Y WITNESSES H. L. KOEHLER.

PRINTING PRESS.

' APPLICATION FILED JULY 2, 1912.

1,103,147. Pa ented July 14,1914.

4 SHEETS-SHEET 3.

ran TAT PRINTING-PRESS.

arca es.

Specification 01 Letters Patent. Patqnted July 14, T9148 Application filed July 2,1912. Serial m. romas.

To all whom it may concern:

Be it known that I, HENRY L. KOEHLER,

a citizen of the United. States, residing-at Louisville, in the county-of Jefferson and State of Kentucky, have invented certain new and useful Improvements in Print ng- Presses; and I- do hereby declare the following to be a full, clear, and exact description I of the invention, such as will enable'others skilled in the art to: which it appertains to make and use the same.

This invention relates to printing presses, and it relates more particularly to an improved rotary printing press.

An object of the invention is to provide an improved rotary printing press for printing on burlap, and especially on burlap bags for quickly relieving the pressure between the printing roller and the pressure roller.

A still further object is to provide an improvedresilient mounting for the pressure roller. I D

A still'further object isto provide a resilient cushion between the printing roller and the ressureroller.

A still further object is to rovide iinproved means for securing t e printing plates on the rinting roller.

A still furt er ob ect is to provide an proved ink' feeding and ink distributing mechanism.

Other objects and advantages may be recited hereinafter and in the claims.

In the accompanyin form a part of this app icationyFigure 1 is a right side elevation of my improved rotary. printing press, having'm improved deliv 1 ering mechanism attache Fig. 2 is'a left similar re erence characters correspond to side elevation of my improved printing machine. I Fig. 3 is a front elevation thereof.

Fig. dis a rear elevation thereof.

,Referrin to these drawings, in which similar parts'throughout the several views themain' frame of the machine consists .o

a right-hand support 15, a left-hand support 16, yoke supports 17 and a yoke 18, said yoke v drawings, which printing roller.

the hags'into the machine, I provide a supports and yoke supporting the inking mechanism, which will be hereinafter described. The several supportsare held in vertical, parallel and spaced relation by means of struts 19 and a feed table or front table'20. I

The printing roller 21 is mounted on a main shaft or printing roller shaft 22, the latter being journaled in bearings 23, which are fixed to the members 15 and 16.

A pressure roller 24 is carried by a shaft 25 which is mounted in bearings 26, said bearings being slidably seated in the recessed walls of the members 15 and 16, and being guidedfor vertical movement between the vertical guide elements 27. The bearing 26 is seated upon a resilient cushion 28, of rubber or the like, said cushion being carried by a flanged lifter plate 29.

Theframe members 15 and '16 are do pressed at 30 for the accommodation of a lifter cam 31 mounted on a lifter shaft 32, said shaft being seated in apertures through the depressed portions 30 of the frame. The top of the pressure roller is normally in the same horizontal plane with the top of the table 20, the rear end of said table extend ing into close proximity to saidpressure roller. In front of the table 20 a feed roller 33 is n ounted on the shaft 34, said shaft being joui'naled in bearings 35, said bearing being adjustably secured to the frame members 15 and 16, as shown at 36, a set screw 37 being provided for the adjustment of the bearing relative to the frame. A feed belt 38 passes around the rollers 24 and 33, and shoulders 39 are provided on the roller 24 for guiding the belt 38. It is obvious that the belt 38 extends approximately throughout the length of the roller 24, or in other words, the. width of the belt 38 is as great or greater than the width of'the bag or other article to' be printed, so that said article will not be dragged over a fixed surface,

which might cause the same to be'i'etarded,

while being fed; and wrinkling or puckering of the article is thereby avoided. This belt is preferably made of resilient material such as rubber or the like, or of a composition of rubber'andcanvas, so that the pressure roller 2% is provided with a resilient coating between its outer surface and the In order. to provide for quickly feeding air of feed disks 10 which are prefer-Ebb depresses the venting the bags from slipping. These disks are fixed on a shaft 41 which is rotatably mounted in lifter arms '42, said arms.

being fixed on a shaft-43, journaled in bearings, 44,' carried by brackets 45 which are seeured'on the frame; The arms 42 constitute forwardly extending elements of lifting levers of which the rea'rwardly extend-- ing arms 46 censtituteiother elements. The

brackets 45 are made adjustable so that feed disks 40 can bemadezto bear on thefeed belt at all timesibut itis preferablethatsaid disks be slightly raised at intervals, as shown. The rollers 47 arejournaled at48' to the rear ends of the arms 46, said rollers beingoperatively related to cams 49, fixed on'the shaft 22' so that when the printing roller andv shaft 22 are rotated, the cam 49 contacts *with the roller 47 rear end of the lifter lever, and thereby raises the feedfdisks, as

, shown. ,However, when the printing roller atthe' moment when the bag is in proper being provided with a rabbet 51 into which the free end of the delivery fan 52 is adapted to be seated, a strip 53 of rubber orthe like, being provided-to cushion the fall of the fan into the rabbet.

The delivery mechanism may be either in the 'form of an attachment, or it may bemade fixed and permanent with the print ing press. This delivery mechanism consists of side arn.s,-one of which is indicated by the numeral 54,said side arms being se-' cured together by means of struts 55 and shafts 56 and 57. The shaft 56 carries the fan 52- and has a crank' 58 "fixed thereon, said crank carrying a roller 59' which is -;-adapted for movement longitudinally .of a

channeled arm 60, so that when the arm 60' is swung on the shaft 57 the crank 58 is thereby swung through an angle of approximately 160 or into approximately horizontal position so, it will be seen that, when the bag which has been printed slides upon the fan 52, the fan will-swing rcarwardly and deposit the bag in horizontal position. In order to'operate the delivery mechanism position thereon, the actuating means for the delivery mechanism must be properly timed with relation to-the time when the printing operation has been completed. This actuating mechanism consists of a delivery actuating lever 61, pivoted at 62 to the: frame and being pivotally connected at.

shaft 22.. In order to properly time the" movement-of the delivery'mechanismwith.

'63 to a link 64, the latterlbing pivdttd?at.

65 to: the lever 60. The upper end 'of the lever 61' carries a roller 66 which is coiiper atively related to a cam 67, secured onthe that of the printing mechanism, it is I necessary to'sli-gh-tly rotatethe cam 67 upon the shaft 22 and to secure it in adjusted po-f sition by means of a set screw/68.1 Theframe 54 is removably sectired on the 1 frame members 15 and l6 b l nealng ofstuds. l5 and 15 the latter co 'stitutingrgexten-t sions of the rod 19, the fra ie '54 being pro vidd with slots54 and 54; wh"hmay-be easily passed over the shan is estudsi', 15 and 15*, so that the delivery mechanis' may be quickly and easilyrem'oved andire placed. I

The frames 15 a butter 15 of rubber or other suitable material, for stopping the rearward movement, of the lower end of the lever 61, and for limiting the downward movement .ofv-tlie fan 52. The slot 74 can either be inadditional bracket 73 or inmain archlSr; Z: The inking .mechanism consists of aitanle. or receptacle 69, for containinga supplyt'of ink; a feed roller 70 being located therein, a transfer roller 71, mounted upon la'shaft 72i 5' L said shaft being carried by a bracket 73,a nd-=. adapted for transverse movement'in aaslot 7 4 of the bracket; an ink distributing rollers 75, loosely mounted on the main driveshafie 76; roller shifters 77 pivotallymountedat 1 p 77 *3 to the-frame, for shifting the r01lert-7 5 out? the shaft 76; cams 78, secured onthe shaft. 76 and adapted to move the shaft72fin;th slot 74, so as to contact alternately with'the feed roller 7 O and the distributing r0llerz75Q1e5" and to apply ink on the latter whlchlcarries the ink to an inking roller 7-9, mountedpn 5 f the shaft 80, and adaptedto contactfwithii the type or printing plates on the printing roller '21, The ink reservoir or tank 69 is= 1 1g provided with thumb screws 8-1 for. regulatg gj ing the quantity of ink fed by the feed rolleri The shifter 77 is provided with.ro-liersi-82 q and 83. The rollers 82 are ada ted to' contact with the respective ends oft e roller l75,,'1; 1 the rollers 83 beingin the path of cams which are formed-on the respective endsalof the printing roller or drum 21. Thesexcams -v 84 are'both arcuate and wedge-shaped as shown in Figs. 1 and 3 r6peCtlVGlyriTh8 feed roller 70 is actuated intermittently bye":

means of a ratchet wheel 70, a awl 70,;a link 7t)". andka crank pin 70. his-crank}; pin is adjustably mounted .in a slot 6.702,"?

formed in the member 70, saidniember be- 12:5."- ing secured on an end of the main driyet, shaft 76.' The link 7 0' and-thepawl 70 m "f pivoted to an oscillatory arm 70?; -journaledw--' on the feed roller 70; so that, with each rev:

olution of the shaft 76, thearm 70 is. drawn and 16 ,are'provided with ge down and pushed up, thereby causing the pawl 70 to engage a different tooth of the ratchet 70, and to rotate the roller 70- quickly, to the distance of one tooth. It is obvious that, by providing the ratchet 70 with more teeth and adjusting the position of the crank pin 7 0, the degree of rotation is secured on the shaft 22 and coacts there-- with for rotating the printing drum and for raising the feed disks 40, through the medium of the arms 42 and 46, the roller 47 and the cam a9. The gear wheels 86, 87 and 88 constitute a train of gears which coact with another gear wheel 89, secured on the shaft 25, for actuating the pressure roller 24. It will be seen that the ratio of the pitch dianitersof the gears 88, and 89 is approximately" equal to the ratio of the diameters of the printing roller and pressure roller respectively; so that the circumferential speed of the faces ofthe printing plates, on the printing roller, is equal t9 the circumferential speed of the pressure roller. Therefore, when abag or the-like is carried between the printing roller and pressure roller, blurring of the printed matter is avoided.

It may some times occur that a bag will be started into the press, between the feed roller and feed disks, and after the disks have descended upon the bag, it may be discovered that the bag has been improperly placed, or that the ba is wrinkled, or for some other reason it is undesirable for the bag to pass between the printing roller and pressure roller. In such an event, the operator should grasp the rod 41 and lift the disk 40,

so that the bag could be easily withdrawn. This may be quickly and easily accomplished because of the free movement of the arms .1.2 and rollers 47, said rollers not being '11 en gagement with the cams 49, but mei ely in contact therewith. However, it ma occur that a bag or the like has been fed into the machine and has started between the pressure roller and printing roller, whereupon it may be discovered that the bag contains or is connected with something which would be detrimental to the printing roller or pressure roller if allowed to pass therebetween; and in such an event it would be necessary to a increase the space between the rollers 21 and 52a, so that pressure would be relieved and tile detriment thereby avoided. In order to accomplish this result, I have journaled the shaft 25 in the vertically movable bearings 26, and have provided the lifter 31, as described in the foregoing. The shaft 32 extends approximately the entire length of the machine and through both of the depressed -portions 30, and carries one of the cams 31 on each of its ends, so that when one of the lifters or cams 31 is actuated, the other is also actuated through the medium of the shaft These lifter cams are actuated by means of a hand lever 90 and a link 91 positioned at one side of the machine, said link being pivoted at 92 to the cam 31, and at 93 to the lever 90*; a latch 94: and a toothed segment 95 being provided for regulating the adjustment of the lever 90 and the cam 31, and at the opposite side of the machine the link 91 has one of its ends pivoted to the cam 31 at 92 and the other end pivoted at 93- to the swinging link 94; so that the pres sure between the printin roller and the pressure roller may be regtilated or annulled, at the will of the operator. The teeth of the gear wheels 88 and 89 are made relatively long, so that said gear wheels are always in mesh, even when the pressure roller is at its lowest position.

Asa means for securing the type or printing plates on the roller or drum 21, I have provided the same with under-cut peripheral channels 21 and have provided oppositely disposed notches 21 in the sides of the channels 21. I have also provided retaming strips or plates 21 which are provided with flared or downwardly converging lugs which are adapted to be inserted into the notches 21. and thence into the slots 21" between the notches. The sides of the strips 21 are rabhetecl, so as to form overhung flanges. In practice, the printing plates (not shown), are provided with flanges on their opposite edges, which are adapted to extend under the flanges of the strips 21", and the number of retaining strips 21 is approximately in proportion to the number of printing lates secured on the printing roller or drum; one more retaining strip being required than the number of printing plates secured thereby.

. It will be seen that l have provided a' machine of this character which is fully capable of attaining the foregoingobjects, and in a thoroughly practical and eiiicient manner.

I do not limit my invention to the exact details of construction, combination, andar rangement of parts, as illustrated and described, but my invention may only be limited by a reasonable interpretation of the claims.

I claim 1. A. printing press providing a main frame having vertical side memhers, vertical guides thereon, a printing roller "ournaled in the frame, a pressure roller, earinge for the same having Sliding engagemeans comprising a link pivoted at one end cam, said link being connected to said lever means for said cams. 2. A printing press provid ng aim'am der said bearings, lifter plates under said resilient blocks, a shaft journaled in the frame under said pressure roller, cams semeiit with said guides, resilient blocksw inder said bearings, lifter'platesun'der said'i'esili-ent blocks, a shaft journaledfin the' frame underisaid pressure reller', cams secured on saids'haft and adapted tebear against said lifter plates for liftingfsaid pressure roller against said printing frame having vertical side-members, Verti" cal guides thereon, a printingrolle'r jo ui' naled in the frame, a pressiire roller, been ings for the same having sliding engagement with said guides, resilient blocks uncured on said shaft and adapted to bear against said lifter plates for lifting said pressure roller against said printing roller, and actuating means for said cams, said to one of said cams above the shaft, and a lever pivoted to the frame to 'one'side of the rell'ei', and aetuatitig resilient "feed tel roller and opera d thereby for feeding armeme to this specification in the two subscribing w1tnesses.

pressure roller, camsseeureden said shaft and adapted t bear against "said lifter plates for lifting said pressure roller-"and said feed belt against said print-ing roller,

"dactuating means for saiuil}cams whiting press prdvi'd'ingi a" main e s, sass-piste assist sense iases, afshaft journaled in the ire-meunder-said 'pressure roller, a feed belt surroiinding'said frame having vertical side membeiflyvertical game-me bers thereon, a printing i'roller uimaled, 1nv the fl ame 1 a fPIGSSU IB- teller, "a 4 mhraeing sa d pressure ticl'es fo s'aid'pninting" rel-lei; bearings 'fOr the pressure roller having sliding engage ments with said guides, resilient blocks under saidbearin'gs', lifter plates-under Said resilient bloeksfa shaft'j'ournaled in the f ame lifter-plates, 'and'means foraetuating said 5 name for simultaneeusly.lifting said pressure-roller and said feed belt against said printingroller.

.In testim0ny whereof I have signed my presence of 6 HENRY L. xeisnnsa.

Witnesses B. C. HEATH. Nnnnns 130mm.

v finder aid pressurepeilerg cams secured en said-"shaftand "adapted tobear against said 

